在(zai)實際(ji)生產過程中，由于(yu)熱(re)(re)(re)封(feng)(feng)(feng)(feng)壓力、制袋機(ji)速(su)以及復合基材(cai)的厚度(du)(du)(du)等(deng)多方(fang)面(mian)影響(xiang)，實際(ji)采用的熱(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)度(du)(du)(du)往(wang)往(wang)要高于(yu)熱(re)(re)(re)封(feng)(feng)(feng)(feng)材(cai)料(liao)(liao)的熔融溫(wen)度(du)(du)(du)。熱(re)(re)(re)封(feng)(feng)(feng)(feng)的壓力越小，要求熱(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)度(du)(du)(du)越高，機(ji)速(su)越快(kuai)，復合膜的面(mian)層材(cai)料(liao)(liao)越厚，要求的熱(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)度(du)(du)(du)也越高。熱(re)(re)(re)封(feng)(feng)(feng)(feng)溫(wen)度(du)(du)(du)若低于(yu)熱(re)(re)(re)封(feng)(feng)(feng)(feng)材(cai)料(liao)(liao)的軟化點(dian)，則無論怎樣加(jia)大壓力或(huo)延熱(re)(re)(re)封(feng)(feng)(feng)(feng)時間，均不能使(shi)熱(re)(re)(re)封(feng)(feng)(feng)(feng)層真正封(feng)(feng)(feng)(feng)合。